Configuring Multicast Vlan Replication Based On User Vlans; Establishing The Configuration Task - Huawei Quidway s3700 series Configuration Manual

Quidway S3700 Series Ethernet Switches
Configuration Guide - Multicast
Figure 3-3 Multicast data transmission before and after multicast VLAN replication is
configured on interfaces
Source
ISP1
VLAN4
3.3 Configuring Multicast VLAN Replication Based on User
VLANs
This section describes how to implement multicast VLAN replication based on user VLANs.

3.3.1 Establishing the Configuration Task

Applicable Environment
In traditional multicast transmission mode, a router must copy multicast data for each user VLAN
and send all copies to the downstream device when users in different VLANs request the program
provided by the same multicast source. This mode wastes network bandwidth and adds workload
on the router.
Multicast VLAN replication helps to manage and control the multicast source and the multicast
group members. This function enables users in different VLANs to receive the same multicast
flow and saves bandwidth.
In multicast VLAN replication implementation, VLANs are classified into multicast VLANs
and multiple user VLANs. The S3700 interface connected to a multicast source belongs to a
multicast VLAN, and interfaces connected to members of a multicast group belong to user
VLANs. The multicast VLAN aggregates multicast flows, and user VLANs receive data from
the multicast VLAN.
Issue 01 (2011-10-26)
Multicast Packet
Multicast VLAN 2
Multicast VLAN 3
Router
Switch
ISP2
VLAN4
Receiver
HostA
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3 Multicast VLAN Replication Configuration
Source
ISP1
VLAN4
Receiver
HostA
HostA
Multicast Packet
Multicast VLAN 2
Multicast VLAN 3
Router
Switch
ISP2
VLAN4
HostA
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